Step 1: Log into the Mac computer with your NetID and password
Step 2: Make sure the USB cord for the Elgato HD60 X is connected to the Mac computer.
Step 3: After you've logged in open the OBS software
Step 4: Check to see if the PS4's HDMI cord is connected to the HD60 X device. (It should be connected to HDMI In). The TV should also be connected to the HD60 X (HDMI Out).
Step 5: Turn on the TV and PS4, and then insert game.